DEVICE TO RELEASE A SELF-EXPANDING IMPLANT

• US 20120143303A1
• Filed: 12/01/2011
• Published: 06/07/2012
• Est. Priority Date: 12/01/2010
• Status: Active Grant

• Current Assignee: C.R. Bard, Inc. (Becton, Dickinson & Co)
• Original Assignee: C.R. Bard, Inc. (Becton, Dickinson & Co)
• Inventors: Dorn, Jürgen, Dietrich, Daniel
• Granted Patent: US 9,168,164 B2
• Time in Patent Office: Days
• US Class Current: 623/1.12
• CPC Class Codes: A61F 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
• CPC Class Codes: A61F 2/97 the outer sleeve being splittable
• CPC Class Codes: A61F 2002/9665 with additional retaining means

Abstract

A device to release from an implant bed in the device a self-expanding implant by pulling back proximally, the length of the implant, a rolling membrane with an inner sleeve that extends distally to the distal end of the implant and an outer sleeve that extends proximally, from the distal end of the inner sleeve, the outer sleeve, during said release, pulling the distal end of the inner sleeve back proximally over the abluminal surface of the remainder of the inner sleeve, proximal of its distal end, the device having a slitter, that is caused to move proximally contemporaneously with the outer sleeve, to slit the inner sleeve progressively, starting at a distal point in the inner sleeve, and progressing proximally along the length of the inner sleeve.

Claims

1. An implant delivery device, comprising:

a rolling membrane with an inner sleeve that extends distal of a distal end of an implant positioned over an implant bed, and an outer sleeve that extends proximal of a proximal end of the inner sleeve; and

a slitter that moves proximally contemporaneously with the outer sleeve portion upon proximal movement thereof, the slitter slitting the inner sleeve beginning at a distal point of the inner sleeve and progressing proximally along a length of the inner sleeve.

2. The implant delivery device according to claim 1, wherein the outer sleeve includes a plurality of slits, each having a length which is less than 20% of the length of the implant bed, and each of which permits by the opening up of a gap between facing surfaces of the slit, a local temporary increase in the diameter of a portion of the outer sleeve that includes the slit as that portion of the sleeve advances proximally over a zone of larger diameter of the implant within a lumen of the outer sleeve.

3. The implant delivery device according to claim 2, wherein a first set of said plurality of slits is arranged co-linear along a length of the outer sleeve, and a second set of said plurality of slits is arranged co-linear to the first set and evenly spaced therefrom.

4. The implant delivery device according to claim 1, wherein the slitter is arranged such that its slitting action commences at a point that is at or near a distal end of the implant bed.

5. The implant delivery device according to claim 1, further comprising a pull wire to pull the rolling membrane proximally.

6. The implant delivery device according to claim 5, wherein the slitter is in the same longitudinal diametral plane through the device as is the pull wire.

7. The implant delivery device according to claim 1, further comprising a longitudinal shaft, wherein a proximal end of the outer sleeve is attached to a collar that slides proximally over the longitudinal shaft.

8. The implant delivery device according to claim 7, wherein the longitudinal shaft defines a guidewire lumen.

9. The implant delivery device according to claim 7, wherein the inner sleeve and the slitter are bonded to the longitudinal shaft proximal of the implant bed.

10. The implant delivery device according to claim 1, wherein the slitter is a wire that runs an entire length of the implant bed, then passes radially outwardly through a hole in the inner sleeve and runs back proximally between the inner sleeve and the outer sleeve to a point proximal of the implant bed.

11. The implant delivery device according to claim 1, wherein the rolling membrane comprises a cold-drawn polyethylene terephthalate material.